Personal digital assistant calibrator



FIG. 1 is a top right side perspective view of a personal digital assistant calibrator, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof; the left side being a mirror image;

FIG. 4 is a front elevation thereof;

FIG. 5 is a rear elevation thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a personal digital assistant calibrator, as shown and described. 